CVE-2026-87719
Deserialization of Untrusted Data in GitLab
CRITICAL 9.9EPSS 0.6%
GitLab has remediated an issue in GitLab EE affecting all versions from 18.3 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that under certain conditions could allow an authenticated user with Duo Chat access to obtain Advanced Search instance configurations and sensitive credentials using a specially crafted GraphQL subscription argument to bypass serialization and perform server object lookup.
- Affected
- GitLab
- CVSS v3.1 GITLAB
- 9.9 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - EPSS
- 0.57% chance of exploitation in the next 30 days, 46th percentile
- Published
- 2026-09-12
- Updated
- 2026-09-23